Using the DeWalt DCN45RND1 cordless roofing nailer is easy. First, charge the 2.0Ah battery using the included charger. Then, insert the battery into the nailer. Next, open the tool-free nail tray and load the roofing nails from 3/4 inch to 1-3/4 inch. For quick work, use the bump actuation mode. You can adjust the nail depth without tools for precise placement. When using, make sure you hold the nailer firmly and keep your hands away from the nail exit area. Always wear safety goggles. After use, remove the battery to prevent accidental activation. To maintain the nailer, clean it regularly, especially the nail tray and the motor area. Keep it in a dry place and check the battery's charge level periodically.